“Good sermon today. We really liked it,” a man said as Bell signed a copy of his latest book at Schuler Books & Music on 28th Street SE.

“Good,” Bell responded. “I haven’t done one in a while.”

After leaving his role at Mars Hill last year, Bell apparently has been busy writing both a teen version of his controversial “Love Wins” and a “What We Talk About When We Talk About God” book reviewed by MLive’s Charley Honey here. And he now also has another book in the works.

Bell said after Sunday’s signing that he’s co-writing a book about marriage with his wife, Kristen.

“Our friends keep joking, ‘You’re writing a non-cheesy book about marriage’ and everybody’s like ‘it’s about time,’” Bell said.

“Our hope is this appeals to people across the spectrum from all sorts of backgrounds. Regularly, when we’re working (we’ll say) I haven’t really heard anyone talk about marriage like this. So I think we’ve got something. I have a sense that we’re on to something that’s going to be helpful, so we’ll see.”